SPA5X soft key and line key provisioning?

I am running 60+ SPA504g phones with a 3cx pbx. I have basic 'option 66' provisioning in place and that is working fine. It would be extremely helpful to be able to perform some more advanced configurations on the phones.

Specifically, I would like to be able to set the softkey during active calls as well as being able to set line 4 to a shared extension (ext2 settings). The provisioning template that I am using is all XML and the only guide I could find has no references to XML parameters at all.

Is there any detailed provisioning examples that I could point me in the right direction? Are these parameters even available for provisioning control?

Article ID:5756
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Objective
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...
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